Ronald Onderwater is the mastermind behind the unique, head-turning bikes known as the Onderwater Tandems. He originally conceived of the design in the early days of the cargo bike boom in the Netherlands. After seeing some of the latest cargo bikes available from that era, Onderwater was inspired to make one of his own. He still possesses (and uses!) his original prototypes. His most enduring design allows parents to transport their kids, while riding with them, as the kids pedal along, too. They're commonly used by families as rentals at seaside resorts throughout Europe. Whether riding one or witnessing one go by, an experience with an Onderwater Tandem is certain to be a memorable one.